Vacuum-operated make-and-break spark-plug.



H. G. IRWIN.

VACUUM OPEHATED MAKE AND BREAK 'SPARK PLUG.

APPLlCATION FILED DEC.3. 1917.

Patented Nov. 19, 1918-.

y m. WM

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nnmmit'r G. IRWIN, or SPUR, TEXAS..

VAGUUM-OPERATED MAKE-AND-BREAK SIAR-K-PLUG.

Slieoicaton of Letters Patent.

Patented Nov. 1Q, tte

Application ledDecember 3, 19,17. Serial No. 205,196.

To all 'whom t may Concern.:

Be it known that 1,' HERBERT G. IRWIN, a citizen of the United States, residing at Spur, in the county ofy Dickens and State of Texas, have invented certain new and useful Improvements in Vacuuni-perated Make-and-Break Spark-Plugs; and lie'does hereby declare the following to' be a. full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which forni a part of this specification. This invention vrelates to new andl useful improvements-in a vacuum operated make and break spark plug; and consists of a siniple and elicient device ot this nature hav-r ing various details of construction, combinations and arrangements ot' parts which will be hereinafter fullyv described, shown in the accompanying drawings and then specically defined in the appended claim.

My invention is illustrated in the accompanying drawings which, with the letters of reference marked thereon, iorin apart of this specilication ,andin which:

Figure 1 is a vertical central sectional view through the invention.

Fig. 2 is a top vplan view of the invention, the laterally extending portioirof which is shown in section, and

Fig. 3 is a bottoni plan View. e

Reference now being had to the details of the drawings by numerals:

1 designates a plug body, and 2 is a stationai'y electrode mounted in a-tube 5, with insulation 6 intermediate the same and the electrode 2. The upper end of the electrode has a terminal connecting nut and designates an oscillating electrode, with a laterally extending contact 'nger 3X at itsloWer 'end and4 which electrode 3 is mounted iii a suitable' guide member 7 held within the plug and in which'latter a suitable lubrication, designated by letter z', is placed in ortoniee of thiapatezit may "ne obtained for avc cents each, 'by Y Washington, E. Q.

der to lubricate the bearing part oi' saidv electrode 3. A coiled spring 10 is mounted over the shouldered portion of the guide member 7 and bears intermediate the latter and the under 'surface of an arm 8; which has an angular outlined opening therein to receive the angled portion of the electrode Said arm as shown clearly in Fig; 2 of ne the drawings, has b veled connection at one end with a link 1l, which in turn is pivotally connected to the lugll`^l upon the piston 13 mounted within the vacuum cylinder l,

and 17 is a spring interposed between 'the f5@ piston 13 and the wall of the vacuum chainber with which the pipe 15 communicates, and which latter is adapted to communicate with the source of vacuum..

liropeiation7 it will be noted that by the o5 varying impulses imparted to the piston, in-

cident to the vacuum formed in the engine, the oscillating electrode will be actuated so as to regulate the sparking of the plug to the work required of the same as the enginej operates.

' What l claim to be new y A vacuum-operated ma'ke and break spark plug comprising a shell, a tube mounted therein,4 an electrode passing through said tube and shellfand suitably insulated therein, a spring actuated oscillating electrode ypassing through an aperture in the bottoni of the shell and having a. beveled shoulder engagingthe marginal edge of the aperture.

a guide member within the shell termina-ting a slight dist-ance above the bottom of the shell and through which member' said oscilv lating electrode passes, an arm 'fitted to the top of the oscillating electrode. a vacuum addressing the .Commieiener of Entente, 

